I am preparing the CCHS(2007) Synthetic files for a research team, and have found that there are missing data for WTS_S, the ‘shared’ Weight variable. This is unexpected, as all the cases have a weight for the Master weight variable, WTS-M.
The research team would appreciate elucidation on this point!
My contact in Health Statistics Division provided the following explanation for the missing WTS_S data in the CCHS 2007 synthetic file:
“The reason for WTS_S being blank is because it’s the share weight and therefore only populated by users that agreed to share their data.”